Glassware blowhead arrangement



June 2, 1953 s, w N 2,540,298

GLASSWARE BLOWHEAD ARRANGEMENT Filed Aug. 2, 1950 55 is Z2 Z8 2 Sheets-Sheet l //v MENTOR:

W'EWW SHMUEL E. W/A/DERI June 2, 1953 s, w N 2,640,298

GLASSWARE BLOWHEAD ARRANGEMENT Filed Aug. 2, 1950 2 Sheets-Sheet 2 lh/VEN SFIMUEL E. W/NDEE,

Patented June 2, 1953 GLASSWABE nLoWHEAn ARRANGEMENT Samuel Winder, West Medway, Mass., assignqr i il ee qhi of bn eha J new 0- passeng r Application August-,2, 1950, Serial;No. ;17f7,1q3 F1 ,glainis. (Cl. 49-18) The present invention relates to a g lassware blowhead arrangement andmore particularly to on n whi h a whsed i ne matical le t 'ed r m an e atin o i nto' a r a ded position, and H also in which the .blowhead. ,conducts ,air under pressnre to a mold so as to en large the product to be molded therein.

This invention relates especially to a hlo vheati device of thetype exemplified hy thefinish mold that is formed as an integralpart of the motor cylinder casting with additional air ports and passages in the sleeve in the piston rgdior conducting air to the Icylowhead for actionuponthe glassware within the mold.

The present design of the hlowheacl isone that ventirely separates thetwo air systems, namely,

that for operating thepneu natic mo tor andthat for-delivering air tothemold. The cylinder and piston rod aresealed 01% at the endof thefcylinder and the blowhead air is introduced into the pistonrod outside the cylinders, ,by aseparate means. p

The present arrangement thus seals oir the lower end of the pneumatic :mo'tor piston and cylinder so that, when p the lowerfend of the cylinder is charged with air under pressure to hold the blowheadaway from the moldlthere canbe no escape of air through-leakage into, the blowhead air passages. This saves air, but more-particularly it avoids the dischargeof air fromthe lblowhead onto the-ware in the mold fjat irregular times, which may -for example causelpremature cooling oftheware. A1so,;a more stahl'e eonstruction is provided by virtue, of having a parallel sliding rod assemblythat rednoesthe turning and rockingtendency of themain.piston.

In the drawings:

Figure 1 is afront elevationof the lolowhead construction showing its mounting upon a 1 glass machine;

Figure 2 is, a side elevation thereof Figure 3 e r i a lmedia sec io ia e piston rod. I

at-520'. While-the? lchinethwmpw adsIa, .1:

th ine arias-i 1, wi h ie pis n an 13 .9 h a re ilii w'f lr is asiin'il v ri i etm d s se to that of Figure'3 but withthepiston and blowhead in ad anced p rating e t q Figure '5' i a vertical sectionthrough the secnda l de r td velv tek'ehbn h line K189: Fi ure a w t th Trod . s i fil wiew sim la to F re bw' i h the rod down;

i V 7 i 3. ????59? horiz ta t i through .the crosshead connectioh, taken on the line 7-1 {at the lower pia l ft Q "Q f Figure 1;

Fi u e 18 is t a simi 1493 39 11 31 Section somewhat above Eigure taken" on the line te s 'of i ur 2 Fi ur i an enl r e h rizon a Section through the capand secondary slide rod, taken "on thief ineage or Figiire 5;

Ri e s bi 'e en rge -p an .v w a l Q I th sew miii fiylies e and it EiQili 11 n enla ed 21.3 vi w of th dii imsnt a ks urongwh h the b ow t m otor are supported for li jertical' adjii'strnnt;

Figure 12isa 'paruau s ctionalvievvof the Figure 13 is anenlarged ttom view of'the li a les l m die l machin i sh 194e, will bl whe d hine for which these e e ecia ly a t s 1 thawehtsme wsd fo blow form. Ihe fixed column inetnelp ris n i :2 l and top firing 22 of Qpresent drawings find counterparts ;,in the ,Winclenmachine;

Asup o ns brack t, gen ral ndig teg at 23, is attached. to thering 1, 22. This bracket eludes an attachment portion 214, having a vera n d 29. 'The outer vertical edges Of-thesemic 'cular part 26 are oiitwardly turnedtoprovide A j ac kscrew g' 2 extends I between the i twoledges 2B and 2 9, and is rotatably mounted there- ;t hrongh. At itsupperend, itreceives a handle s ain t l w fsh fi sfhe a mm, by wa tion not limited 3 of which it may be tightened in any position of adjustment.

A cylinder member, generally designated 35, is mounted for vertical adjustment on the bracket 23. It has a slide 36 that fits over the outer surfaces and side edges of two tracks 30 and 3|. It has also two track elements 38 and 39 bolted by bolts 40 to its opposite edges so that it can be fitted over the two tracks 30 and 3| and can be adjusted vertically therealong in a manner to securely mount the cylinder member 35 to the bracket 23. The cylinder member 35 has a projection 42 extending outwardly therefrom and fitting within the semi-cylindrical vertical part 26 of the bracket 23, and also threaded to receive the jackscrew 32. By this arrangement, the rotation of the jackscrew causes vertical movement of the cylindrical member 35.

The cylindrical member 35 has a pneumatic motor cylinder 46 in it which receives a cylinder head closure 41 attached by bolts 48. The lower end of the cylinder 46 is provided with a sleeve 49 extending downwardly.

A motor piston 50 operates vertically within the cylinder 46, and has a piston rod extending downwardly therefrom and guided within the sleeve 49. A suitable packing 52 seals off the lower end of the sleeve 46.

Fluid connections 53 and 54 lead into the top and bottom, respectively, of the cylinder 46.

The lower end of the main cylinder portion has a lateral extension 55. This extension has a vertical bore 56 extending through it. A sealing cap 51 is secured into the upper end of the bore 56. A slide rod 58, that also acts as a valve, is adapted for vertical movement in the bore 56, and in the cap 51. An inlet 59, for compressed air connects into the side of the extension 55 and opens into the bore 56. The rod 56 normally seals off the inlet 59, but has a groove around it, which in a lowered position of the rod 58 such as is shown in Figure 6, registers with the inlet '59. The groove 60 connects by cross ports 6| with an axial passage 62 through the rod 58 extending down to the bottom of the rod but plugged at its lower end. At the lower part of the rod, which lower part is externally threaded, there are cross passages 63.

A crosshead 65 fits over the lower threaded end of the rod 58, and is removably and adjustably clamped in accurate position by two nuts 66 and 61. This crosshead 65 has a circular opening 68 around the rod 58, and adapted to register with the cross passages 63 in the rod 58. It also registers with a passage 69 extending through the middle part of the crosshead and connecting with another opening 10 through the crosshead 65 parallel to the opening 68. This opening 16 is also part of a split sleeve clamping arrangement with a tightening screw 1|, by means of which the crosshead may be tightly clamped around the lower end of the main piston rod 5|. A setscrew 12 may also be used to aid in preventing movement of the crosshead relatively to the main piston rod 5|. The crosshead 65 is mounted on the piston rod in such wise as to cause the passage 69 in the crosshead to register with a cross port 13 in the main piston rod 5|.

This cross port 13, in turn, connects into an axial passage 14 in the main piston rod that extends downwardly through the lower end of the piston rod. The passage 13 in the main piston is entirely outside of the cylinder 46 and its sleeve 49.

The lower end of the piston rod is provided with a head that is here conventional, with a plurality of radial projections 15 that interflt with complementary recesses on a blowhead H, the arrangement being such that the blowhead can be readily removed or attached by twisting it and moving it axially. A plunger 16, spring pressed by a leaf spring 19, may be used to hold the blowhead 11 in place. The plunger 18 may engage in suitable notches 80 in the lower end of the piston rod 5| in a manner shown in the Winder application referred to.

This blowhead apparatus is mounted so that the reciprocation of the piston motor will cause the blowhead to move from its retracted, inoperative position to its blowing position and to return therefrom. During this retraction of the blowhead, the glass parison is inserted into the mold and is normally allowed to remain therein for an interval during which it reheats. After reheating of the parison, the blowhead advances to the position of Figure 4 for blowing out the parison. Upon completion of this blowing phase, the blowhead is retracted, so the mold can be opened and the ware removed. Subsequently the mold is recharged with another parison, and the cycle is repeated.

The stroke of the blowhead is determinedby the stroke of the piston 56. Since the elevation of the top of the molds M may vary with different ware, the adjustment provided by the knob 33 is used. With the piston down, as shown in Figure 4, the knob 33 is adjusted with the nut 34 loose, until the head H is in proper engagement with the top of the mold M. Then the nut 34 is tightened to hold the adjustment thus made.

The two piston motor air lines 53 and 54 are connected to a typical four-way valve that is operated in a predetermined cycle related to the operation of the Whole glass machine. By this four-Way valve arrangement, such as is illustrated in detail in the Winder application, air under pressure is admitted to the top of the cylinder 46, while the space below the piston is exhausted to atmosphere, and the piston is driven down to the position of Figure 4. When the blowing is complete, the air connections just mentioned are reversed, air under pressure being delivered through the lower air line 54, and the upper air line 53 being connected to exhaust. The piston 56 is elevated back to the position of Figure 3.

Air under pressure is also connected to the line 59 that leads into the extension 55. As long as the piston is up, the rod 58 also is up, and with the groove 66 out of registry with the inlet 59 the air is out off by the piston surface and cannot further enter the opening 56.

When the main piston 50 is caused to descend in themanner aforesaid to bring the head I1 over the glass to' be blown into the bottle B, as soon as the piston reaches its operating position the groove 66 will register with the air inlet port 59 on the extension 55, and this'air will then be delivered through the-cross passages 6|, the axial passage 62 within the rod 58, and the cross ports 63 thereof into the circular opening 68 in the crosshead 65. From this opening, the air is delivered through the passage 69 to the main piston rod where it enters through the port 13 to the axial passage 14, and is thereby delivered to the main blowhead TI and to the glass to be blown into the bottle B.

When the blowing operation is completed, the pneumatic motor air connections are reversed and the piston is elevated by air under pressure introduced into the lower end of the cylinder 46. As soon as the piston rises a short distance, carrying the crosshead 5 and the rod 56 with it, the port 59 will again be cut off, so that air is no longer admitted into the blowhead. The piston 50 will rise to the position of Figure 3, and will be held there by the pressure of air in the lower end of the cylinder 46 until a new cycle is required.

In the present construction, the main piston rod conducts the glass blowing air in a manner that is entirely disconnected from the operation of the piston. The blowhead air passage 14 and its cross port 13 do not have to come within the guide sleeve 49 of the cylinder 35 at all. Consequently, with suitable packing such as that shown at 52, a good working seal can be obtained for the piston rod 5| that will prevent the escape of air from the cylinder 46 when the piston is in the position of Figure 3.

In addition to the function of isolating the two air systems, the present construction also is more stable than that of the Winder application. The second rod 58 can perform the function of preventing the twisting of the main piston rod 5|, and also by being in the nature of an outboard guide can reduce the twisting effect that increases wear on the sleeve bearing 49 for the piston 50.

The rod 58 operates within the dust cap 51 which keeps dirt and foreign matter from clogging the groove 60 and the associated ports. It will be seen that all of the ports are protected.

When the present invention is used on a multiple machine, such as that shown in the Winder application, a suitable number of the heads will be disposed around the supporting framework of the machine, so that they may be actuated during rotation of the frame. The construction lends itself to interchangeability of the parts which improves the facility of servicing the equipment.

What is claimed is:

1. In a blowhead construction, a fluid power motor having a cylinder and a piston operable in the cylinder with a main piston rod advanced and retracted by the piston, a second reciprocable rod in parallel spaced relation to the piston rod, fixed means in which the second rod advances and retracts, and a crosshead rigidly interconnecting the two rods outside the cylinder for constant positional relationship therebetween, there being air conducting passage means extending consecutively through the secondrod, the crosshead and the main piston rod, and opening from the external part of the main piston rod; and there being also fluid passage means into opposite ends of the cylinder.

2. The combination of claim 1, wherein the fixed means is provided with an air conducting passage, said passage being positioned to communicate with the aforementioned air conductment of the main piston rod, and wherein the,

fixed means is further provided with air conducting inlet means for selective communication with the aforementioned air conducting passage means.

5. The combination of claim 1, plus means on the end of the main piston rod for attachment and removal of a blowhead.

6. In a blowhead construction, a pneumatic motor comprising a cylinder, 3, piston and a piston rod, the piston rod including a portion extending continuously outside the cylinder, air line connections into the cylinder at its opposite ends, a blowhead on the extended portion of the piston rod to be moved thereby into and out of blowing association with a mold, first fluid passage means in the extended portion of the piston rod communicating at one end with the blowhead and terminating exteriorly of the piston rod at a point intermediate the blowhead and the cylinder, a movable rigid member connected with the piston rod to move therewith and having second fluid passage means communicating with said first fluid passage means, and a fixed rigid member in which the movable rigid member reciprocates, the fixed rigid member having a third fluid passage means for connection into said second fluid passage means.

7. In a blowhead construction, a fluid power motor having a cylinder and a piston operable in the cylinder with a main piston rod advanced and retracted by the piston, fluid passage means into opposite ends of the cylinder, means on one end of the piston rod for attachment and removal of a blowhead, a crosshead secured to the piston rod for reciprocation therewith, a second reciprocable rod disposed in parallel spaced relation relative to the piston rod and secured to the crosshead for reciprocation therewith, fixed guide means slidably receiving the second rod, air passage means extending consecutively through the second rod, the crosshead, and the piston rod, said air passage means having one terminus at the blowhead end of the piston rod and another terminus in the second rod, additional air passage means in the fixed guide means, and means for communicating the first and the last mentioned air passage means only at a predetermined position of the second rod relative to the fixed uide means.

SAMUEL E. WINDER.

References Cited in the file Of this patent UNITED STATES PATENTS Number Name Date 1,695,894 Glaspey Dec. 18, 1928 1,818,725 Lorenz Aug. 11, 1931 1,832,080 Allen Nov. 17, 1931 1,843,159 Ingle Feb. 2, 1932 1,854,471 Hofmann Apr. 19, 1932 1,869,920 Soubier Aug. 2, 1932 

